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DOE is publishing this test procedure final rule to implement the directive in section 413 of the Energy Independence and Security Act of 2007 (EISA, Public Law 110-140) to establish energy conservation standards for manufactured housing. Test procedures are necessary to provide for accurate, comprehensive information about energy characteristics of manufactured homes and provide for the subsequent enforcement of the standards. See 42 U.S.C. 7254 and 17071. This test procedure final rule establishes applicable test methods to support the energy conservation standards for the thermal envelope requirements, air leakage requirements, and fan efficacy requirements. The test procedure would therefore dictate the basis on which a manufactured home’s performance is represented, and how compliance with the energy conservation standards would be determined.